import { asyncRouterMap, constantRouterMap } from '@/router'
import { getRouter } from '@/api/login.js'
/**
 * 通过meta.role判断是否与当前用户权限匹配
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.indexOf(role) >= 0)
  } else {
    return true
  }
}

/**
 * 递归过滤异步路由表，返回符合用户角色权限的路由表
 * @param asyncRouterMap
 * @param roles
 */
function filterAsyncRouter(asyncRouterMap, roles) {
  const accessedRouters = asyncRouterMap.filter(route => {
    if (hasPermission(roles, route)) {
      if (route.children && route.children.length) {
        route.children = filterAsyncRouter(route.children, roles)
      }
      return true
    }
    return false
  })
  return accessedRouters
}

const permission = {
  state: {
    routers: constantRouterMap,
    addRouters: []
  },
  mutations: {
    SET_ROUTERS: (state, routers) => {
      state.addRouters = routers
      state.routers = constantRouterMap.concat(routers)
    },
    // cover routers
    NEW_SET_ROUTERS: (state, routers) => {
      console.log('inner new ser routers')
      state.routers = routers.menuList
      console.log('route_________________ after')
      console.log(state.routers)
    }
  },
  actions: {
    GenerateRoutes({ commit }, data) {
      return new Promise(resolve => {
        const { roles } = data
        let accessedRouters
        if (roles.indexOf('admin') >= 0) {
          accessedRouters = asyncRouterMap
        } else {
          accessedRouters = filterAsyncRouter(asyncRouterMap, roles)
        }
        commit('SET_ROUTERS', accessedRouters)
        resolve()
      })
    }
  },
  GetRoutes({ commit }, data) {
    return new Promise((resolve, reject) => {
      getRouter().then((res) => {
        commit('SET_ROUTERS', res.body)
        state.routers = constantRouterMap.concat(routers)
        console.log('set state routes')
        console.log(state.routers)
        resolve(res)
      }).catch((err) => {
        reject(err)
      })
    })
  }
}

export default permission
